Only the oldest plain OM-2 (falling between serial numbers 100,000 to
200,000) will have center weighted curtains (though I did put CW curtains
into a 2N for a chap in the early 80's). So afaik, all 2/2N with averaging
curtains do average metering in otf mode.
----------------------------------------------------
John Hermanson www.zuiko.com
mail: omtech@xxxxxxxxx
Camtech, Olympus Sales & Service since 1977
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----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Saturday, February 14, 2004 7:09 AM
Subject: [OM] OM2n meter weighting pattern. Was: OM2n exposure
> Didn't someone already suggest firing the camera after removing the
> batteries? That will interrupt the exposure cycle after lifting the
> mirror and exposing the shutter curtain. At that point you can examine
> the curtain's black and white speckled metering pattern.
>
> If it's center weighted there will be more white speckles toward the
> center of the curtain. If it's an averaging pattern they will be evenly
> distributed across the entire curtain.
>
> Replace the batteries to allow the camera to complete the exposure cycle.
>
> As I recall, there were two different patterns used in early and later
> OM-2's. I don't know if there was ever more than one pattern used in
> OM-2n's. I suspect it's the same as the later model 2's. Anyhow,
> examining your own shutter curtain will answer the question for your
> particular camera.
>
> Chuck Norcutt
>
> Moose wrote:
> > I've been waiting for someone more knowledgeable to answer, but they are
> > being coy. I would swear that I've seen graphs of this, but I can't
> > remember where. Generally, I think you can assume that 'most' of the
> > sensitivity is in the central 1/3 of the viewscreen. Not very
> > scientific, but that'a the impression I gained using a 2n for many
years.
>
>
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